Cant setup the plugin

@safnasash Thanks for reaching out. This message can occur if there is something blocking access to the Site Kit service. This could be at host or browser level. So we can determine more on this, please share the following:

1. Your Site Health information. You can use this form to share privately if preferred. 
2. When checking the Site Kit dashboard from a Chrome browser incognito window does the same occur? This can help indicate a browser related block.
3. Do you see any warnings or errors when checking yourSite Health status (Tools > Site Health > Status), which differs from your Site Health information requested above? Such errors may include REST endpoint references.

Let me know if you have any questions with the above.

Hello,

thank you for your valuable reply.

i have shared the Site Health Information as you suggested. also tested the site in incognito, same error occur there also. and finally, checked the

Tools->Site Health->Status ,shows 4 critical errors:

1:You have plugins waiting to be updated

2:Could not reach www.remarpro.com

Communicating with the WordPress servers is used to check for new versions, and to both install and update WordPress core, themes or plugins.

Error Your site is unable to reach www.remarpro.com at 198.143.164.251, and returned the error: cURL error 7:

3: Background updates are not working as expected

Background updates ensure that WordPress can auto-update if a security update is released for the version you are currently using.

• Error The WP_AUTO_UPDATE_CORE constant is defined as false
• Passed No version control systems were detected.
• Passed Your installation of WordPress does not require FTP credentials to perform updates.
• Passed All of your WordPress files are writable.
• Error WordPress security and maintenance releases are blocked by define( 'WP_AUTO_UPDATE_CORE', false );.

4:Page cache is not detected and the server response time is slow

@safnasash Thanks for sharing. The thing that stands out to me here is point number 2 regarding www.remarpro.com not being able to be reached. It would be good if you could get this resolved before we troubleshoot this further to see if this resolves the issue on the Site Kit side.

I have found a previous support topic on this which may provide you with some answers. If you are unable to fix this from that topic then I would suggest opening a new topic in the Fixing WordPress forum.

Once resolved, check if your Site Kit is still having issues and if so then please let us know here and we can look further into this with you.